-~ 42 man was performed by the NAS-MRC Advisory Committee on the Biological Effects of Radiation. , is referred to us 1972, A. Their report, the BLIR Report. published in 73 Occupational Exposure The existing occupational exposure standard for uniform whole body irradiation is 5 rem/yr and for the lung, the BEIR Report estimates that exposure of 15 rem/yr. the whole body of an individual «to 5 rem/yr would lead to a cancer risk between 4.5x107° and 2.3x1073/yr. 10 -3 /yr. 75 Their best estimate is Their estimate of the risk of cancer to the individual from a lung exposure of the 15 rem/yr is 3xl07>/yr. 7° Allowing a risk of cancer induction between 1/1000 and 1/1C,000 per particle, Table V presents the maximim permissible lung particic burdens (MPLPB) that result in risks comparable to these uniform radiation standards for occupational exposure. The MPLPB values in Table V represent a very substantial reduction in the MPLB. A hot particle of Pu-239 at the lower limit activity contains only 0.07 pCi while the MPLB for ‘occupational exposure. is 1.6x10% pGi. Thus the 73/ NAS-NRC, "The Effects on Populations of Exposure to Low Levels of Ionizing Radiation," (BEIR Report), NAS-NRC, Washington, D. C. , Nov. 1972. 74/ Ibid, p. 91. 75/ Ibid, p. 91. 76/ Ibid, p. 156. . . ma AE: eH i wot > a > Lae . wie i vt ¢ on TNS A NEMA TY eg Re oo ‘ we : we 2 mo y - me, . * ee yy EGE vee anOe os Piea :a ad Ts wot ‘' fe, . 44 sega * <i} m . oe eon ~ tC, atTN won re 1 oe nat er »- CAR es veSe a. Be aye. ae“ ri A Os rf e tray - ao . Loe yg ' t .